Threat Database Trojans Trojan.Shellcode.CU

Trojan.Shellcode.CU

By CagedTech in Trojans

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 0
First Seen: July 10, 2026
OS(es) Affected: Windows

The detection of Trojan.Shellcode.CU on your system indicates a potential security threat that requires immediate attention. This type of threat is designed to compromise the security and integrity of your computer, and it's essential to understand its nature and how to remove it effectively.

What Is Trojan.Shellcode.CU?

Trojan.Shellcode.CU is a type of malware that belongs to the broader category of Trojan horses. Trojans are malicious programs that disguise themselves as legitimate software, allowing them to bypass security measures and infiltrate computer systems. The term "Shellcode" often refers to a small piece of code used as the payload in exploits, which is designed to execute a command or set of commands on a compromised system. Understanding the specifics of Trojan.Shellcode.CU is crucial for developing an effective removal strategy.

How Trojan.Shellcode.CU Operates

Once Trojan.Shellcode.CU infects a system, it can operate in various ways, depending on its intended purpose. Commonly, Trojans are used to create backdoors, allowing remote access to the infected computer. This can lead to unauthorized data theft, installation of additional malware, or even the use of the compromised system for malicious activities such as spamming or participating in botnet attacks. The operational specifics of Trojan.Shellcode.CU can vary, but the end goal is typically to exploit the infected system for malicious gain.

Symptoms of Infection

Identifying the symptoms of a Trojan.Shellcode.CU infection can be challenging, as Trojans are designed to remain stealthy. However, possible indicators of infection include unexpected system crashes, slow performance, unfamiliar programs or icons, and unusual network activity. Additionally, if you notice that your antivirus software is disabled or that certain security settings have been altered without your consent, it could be a sign of a Trojan infection.

How to Remove Trojan.Shellcode.CU

  1. Boot your computer in Safe Mode with Networking to prevent the malware from loading and to allow for a more effective removal process.
  2. Use a reputable anti-malware tool, such as SpyHunter, to perform a full scan of your system. Ensure the tool is updated to the latest version to increase the chances of detecting and removing Trojan.Shellcode.CU.
  3. Uninstall any suspicious programs or applications that you do not recognize or that were installed around the time the infection was detected.
  4. Reset your web browsers (Google Chrome, Mozilla Firefox, Microsoft Edge, etc.) to their default settings to remove any malicious extensions or settings that the Trojan might have altered.
  5. After completing the above steps, reboot your computer and perform another full scan with your anti-malware tool to ensure that Trojan.Shellcode.CU has been completely removed.

Conclusion

Removing Trojan.Shellcode.CU requires careful and systematic steps to ensure that the malware is completely eradicated from your system. It's also crucial to adopt preventive measures, such as keeping your operating system and software up to date, using strong antivirus protection, and being cautious when opening email attachments or downloading software from the internet. By understanding the nature of Trojan.Shellcode.CU and following the removal guidelines, you can protect your computer and personal data from this and similar threats.

Analysis Report

General information

Family Name: Trojan.Shellcode.CU
Signature status: No Signature

Known Samples

MD5: 86f69126c579988073457fb145344c87
SHA1: 336d02016d99b88f5e455517d2c406566523a2c2
SHA256: F954B062442931C177852512C4107F5CEAF059227E5939510EA6CF74AE5A15FF
File Size: 653.46 KB, 653461 bytes

Windows Portable Executable Attributes

  • File doesn't have "Rich" header
  • File doesn't have debug information
  • File doesn't have exports table
  • File doesn't have resources
  • File doesn't have security information
  • File has TLS information
  • File is 64-bit executable
  • File is either console or GUI application
  • File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
  • File is Native application (NOT .NET application)
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  • File is not packed
  • IMAGE_FILE_DLL is not set inside PE header (Executable)
  • IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

File Traits

  • big overlay
  • dll
  • x64

Files Modified

File Attributes
c:\users\user\appdata\local\temp\sfx009dfabf\nvml.dll Generic Write,Read Attributes
c:\users\user\appdata\local\temp\sfx009dfabf\tax_notice_29482.exe Generic Write,Read Attributes

Registry Modifications

Key::Value Data API Name
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::proxybypass  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::intranetname  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::uncasintranet  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::autodetect RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::proxybypass  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::intranetname  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::uncasintranet  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::autodetect RegNtPreCreateKey
HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe 衎࿋ᔾǝ RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 �� * �/��Y�d�� ��ރ�p��^�o�lVs}kP~��1��7 ���ﺃe��1��ie��r � RegNtPreCreateKey

Windows API Usage

Category API
Syscall Use
  • ntdll.dll!NtAccessCheck
  • ntdll.dll!NtAddAtomEx
  • ntdll.dll!NtAlertThreadByThreadId
  • ntdll.dll!NtAlpcAcceptConnectPort
  • ntdll.dll!NtAlpcConnectPort
  • ntdll.dll!NtAlpcConnectPortEx
  • ntdll.dll!NtAlpcCreatePort
  • ntdll.dll!NtAlpcCreatePortSection
  • ntdll.dll!NtAlpcCreateSectionView
  • ntdll.dll!NtAlpcCreateSecurityContext
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  • ntdll.dll!NtAlpcOpenSenderProcess
  • ntdll.dll!NtAlpcQueryInformation
  • ntdll.dll!NtAlpcSendWaitReceivePort
  • ntdll.dll!NtApphelpCacheControl
  • ntdll.dll!NtAssociateWaitCompletionPacket
  • ntdll.dll!NtClearEvent
  • ntdll.dll!NtClose
  • ntdll.dll!NtConnectPort
  • ntdll.dll!NtCreateEvent
  • ntdll.dll!NtCreateFile
  • ntdll.dll!NtCreateMutant
  • ntdll.dll!NtCreateSection
  • ntdll.dll!NtCreateSemaphore
  • ntdll.dll!NtCreateThreadEx
  • ntdll.dll!NtCreateTimer
  • ntdll.dll!NtDeleteValueKey
  • ntdll.dll!NtDeviceIoControlFile
  • ntdll.dll!NtDuplicateObject
  • ntdll.dll!NtDuplicateToken
  • ntdll.dll!NtEnumerateKey
  • ntdll.dll!NtEnumerateValueKey
  • ntdll.dll!NtFindAtom
  • ntdll.dll!NtFreeVirtualMemory
  • ntdll.dll!NtMapViewOfSection
  • ntdll.dll!NtNotifyChangeKey
  • ntdll.dll!NtOpenDirectoryObject
  • ntdll.dll!NtOpenEvent
  • ntdll.dll!NtOpenFile
  • ntdll.dll!NtOpenKey
  • ntdll.dll!NtOpenKeyEx
  • ntdll.dll!NtOpenMutant
  • ntdll.dll!NtOpenProcessToken
  • ntdll.dll!NtOpenProcessTokenEx
  • ntdll.dll!NtOpenSection
  • ntdll.dll!NtOpenSemaphore
  • ntdll.dll!NtOpenSymbolicLinkObject
  • ntdll.dll!NtOpenThreadToken
  • ntdll.dll!NtOpenThreadTokenEx
  • ntdll.dll!NtProtectVirtualMemory
  • ntdll.dll!NtQueryAttributesFile
  • ntdll.dll!NtQueryDirectoryFileEx
  • ntdll.dll!NtQueryInformationFile
  • ntdll.dll!NtQueryInformationProcess
  • ntdll.dll!NtQueryInformationThread
  • ntdll.dll!NtQueryInformationToken
  • ntdll.dll!NtQueryKey
  • ntdll.dll!NtQueryLicenseValue
  • ntdll.dll!NtQueryObject
  • ntdll.dll!NtQueryPerformanceCounter
  • ntdll.dll!NtQuerySecurityAttributesToken
  • ntdll.dll!NtQuerySecurityObject
  • ntdll.dll!NtQuerySymbolicLinkObject
  • ntdll.dll!NtQuerySystemInformation
  • ntdll.dll!NtQueryValueKey
  • ntdll.dll!NtQueryVirtualMemory
  • ntdll.dll!NtQueryVolumeInformationFile
  • ntdll.dll!NtQueryWnfStateData
  • ntdll.dll!NtReadFile
  • ntdll.dll!NtReadRequestData
  • ntdll.dll!NtReleaseMutant
  • ntdll.dll!NtReleaseSemaphore
  • ntdll.dll!NtReleaseWorkerFactoryWorker
  • ntdll.dll!NtRequestWaitReplyPort
  • ntdll.dll!NtResumeThread
  • ntdll.dll!NtSetEvent
  • ntdll.dll!NtSetInformationKey
  • ntdll.dll!NtSetInformationObject
  • ntdll.dll!NtSetInformationProcess
  • ntdll.dll!NtSetInformationThread
  • ntdll.dll!NtSetInformationVirtualMemory
  • ntdll.dll!NtSetInformationWorkerFactory
  • ntdll.dll!NtSetTimer2
  • ntdll.dll!NtSetTimerEx
  • ntdll.dll!NtSubscribeWnfStateChange
  • ntdll.dll!NtTerminateProcess
  • ntdll.dll!NtTestAlert
  • ntdll.dll!NtTraceControl
  • ntdll.dll!NtUnmapViewOfSection
  • ntdll.dll!NtUnmapViewOfSectionEx
  • ntdll.dll!NtUnsubscribeWnfStateChange
  • ntdll.dll!NtUpdateWnfStateData
  • ntdll.dll!NtWaitForAlertByThreadId
  • ntdll.dll!NtWaitForMultipleObjects
  • ntdll.dll!NtWaitForSingleObject
  • ntdll.dll!NtWaitForWorkViaWorkerFactory
  • ntdll.dll!NtWaitLowEventPair
  • ntdll.dll!NtWorkerFactoryWorkerReady
  • ntdll.dll!NtWriteFile
  • UNKNOWN
Process Manipulation Evasion
  • NtUnmapViewOfSection
Process Shell Execute
  • ShellExecute
Anti Debug
  • IsDebuggerPresent
User Data Access
  • GetUserObjectInformation

Shell Command Execution

(NULL) C:\Users\Umbcvswn\AppData\Local\Temp\sfx009DFABF\Tax_Notice_29482.exe

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